Weeks, Months and TrimestersBaby developing inside you
over the weeks and months
Weeks, Months and Trimesters Guide
|A normal pregnancy lasts 280 days from your LMP which is about 266 days from conception to birth. The first two weeks of your pregnancy includes the time of your period, ovulation and fertilization. Conception occurs approximately 14 - 16 days after the first day of your period.
The date of conception is not always known and can vary between women. The date of LMP is known by most women so doctors use this date as a starting point for pregnancy.
Example: Week 28 (Gestational) = Week 26 (Fetal age)
Week by Week Fetus Development
Lunar Months: When people claim that a pregnancy is exactly 10 lunar months, they are making the mistake of calculating a lunar month to be 28 days long. Lunar months approximate to 29.53059 days (29 days, 12 hours, 44 minutes and 3 seconds). A normal average pregnancy (280 days) is approximately nine and half lunar months, since a lunar month is approximately 29.53 days long.
Find out with our Trimester Calculator
|More information on the First Trimester | Second Trimester | Third Trimester|
Week By Week Pregnancy Calendar
Week 1 Week 2 Week 3 Week 4 Week 5 Week 6 Week 7
Week 8 Week 9 Week 10 Week 11 Week 12 Week 13
Week 14 Week 15 Week 16 Week 17 Week 18 Week 19 Week 20
Week 21 Week 22 Week 23 Week 24 Week 25 Week 26
Week 27 Week 28 Week 29 Week 30 Week 31 Week 32 Week 33
Week 34 Week 35 Week 36 Week 37 Week 38 Week 39 Week 40 Week 41 Week 42